An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5950-00-922-4823
NSN 4140-00-285-6042
NSN 7035-01-474-0244
NSN 5895-00-007-5533
NSN 6220-00-086-5156
NSN 6240-00-351-8564
NSN 5925-01-315-3806
NSN 5935-00-972-8555
NSN 5925-01-511-0220
NSN 6145-01-462-9431
NSN 5925-01-311-9920
NSN 6320-01-514-6141